Snowden's Flight Path Strewn With Obstacles

Travel Documents, Transit Points Pose Questions

Questions swirled Wednesday over whether fugitive Edward Snowden, the admitted leaker of U.S. secrets, has a clear path to asylum in Ecuador.

As Russian officials reiterated that Mr. Snowden was in the transit zone of Moscow's Sheremetyevo International Airport, his ability to leave appeared to hinge on two points—whether there was a country that would allow him free transit on his way to Ecuador, which has said it would consider...